tv [untitled] October 26, 2010 8:00am-8:30am PST
>> thank you for being here. presidio habitat is an exhibition at the presidio trust. it will be in san francisco through may 2011. we hope you will come out to experience this amazing exhibition and great natural treasure. >> to learn more about the other habitats installations in the presidio, visit
francisco. oh, mayor as well. yeah, that's part of the job description. yeah, mayor of san francisco. >> the city is extremely concerned about the emission of green house gasses and making san francisco a sustainable city. >> we need to find other ways to create energy without harm to the environment and this is one source. >> we have over 2 megawatts of solar on various city buildings. we are looking at tidal power and we're beginning to look at geothermal power. >> we're on the roof of the moscone center of san francisco and we have 2500 panels that power the center. >> here we are using real energy, energy from the sun, free energy from the sun coming in right here. this converts directly into electricity. >> all these technologies cost money. they '